CN102935551A - Flash welding forming method of aluminum alloy thin-wall ring member - Google Patents
Flash welding forming method of aluminum alloy thin-wall ring member Download PDFInfo
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- CN102935551A CN102935551A CN2012104791633A CN201210479163A CN102935551A CN 102935551 A CN102935551 A CN 102935551A CN 2012104791633 A CN2012104791633 A CN 2012104791633A CN 201210479163 A CN201210479163 A CN 201210479163A CN 102935551 A CN102935551 A CN 102935551A
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Abstract
The invention discloses a flash welding forming method of an aluminum alloy thin-wall ring member, which comprises the steps of: loading a D type ring blank with an opening in a welder, starting the welder to close the opening of the preheated ring blank is closed, applying a 7-18V voltage between two poles of the welder to ensure that the left end face and the right end face of the opening of the ring blank are heated and molten through a flash current with a current density of 20A/mm<2>-150A/mm<2> to form a lintel, exploding to form a flash, wherein the flash burning loss speed of the ring blank is 6.0mm-10.0mm/s; driving the right end face of the ring blank to make an accelerated feeding movement towards the left end face at an initial speed of 4.0mm/s-6.0mm/s and an acceleration of 2.0mm/s<2>-4.0mm/s<2> so as to ensure that the distance between the left end face and the right end face is not more than 5mm; and after the flash is completed, driving a right straight side of the ring blank to move at a high speed towards a left straight side of the ring blank to ensure that the left end face and the right end face collide with each other under the action of an upsetting force of 6kN-11kN to form the flash welding thin-wall ring member, and keeping the pressure for 10s-20s under the action of the upsetting force. The method can ensure that the flash process is continuously and stably carried out, thereby improving the weld quality.
Description
Technical field
The present invention relates to a kind of welding method, particularly related to the flash welding manufacturing process of aluminium alloy thin-walled ring.
Background technology
Along with the increase of the industries such as Aeronautics and Astronautics, boats and ships, gas turbine, wind energy, nuclear energy and bearing to the ring demand, the ring that adopts traditional milling method to be shaped is because machine-finish allowance is large, stock utilization is low, not only waste a large amount of materials, but also make the cost of ring high.And the ring of employing Flash Butt Welding explained hereafter, it is few that machine adds surplus, and stock utilization is high, and cost also reduces thereupon greatly, is conducive to make ring to be shaped towards the Precision Forming Technology future development.
On November 3rd, 1999, disclosed Chinese invention patent specification CN 1233548A disclosed a kind of automobile, motorcycle aluminium alloy wheel Flash Butt Welding technique, the technological process that this technique adopts for wheel is: pre-treatment → welding condition setting → clamping workpiece → flash of light → upset → pressurize → release clamp → finishing, solved the welding forming technical problem of aluminum-alloy wheel ring, described wheel is the thin-walled ring.But, adopting flash welding technique welding thin-walled ring for example in the process of aluminium alloy thin-walled ring, if the distance between ring base commissure both ends of the surface is controlled and badly will be caused flash of light to end, thus the impact welding continue carry out and weldquality, when serious, also can cause weldment to scrap.
Summary of the invention
When the technical problem to be solved in the present invention is to provide a kind of the welding between the both ends of the surface of commissure by maintaining a certain distance to realize the flash welding manufacturing process of aluminium alloy thin-walled ring, the method can make ring carry out constantly in the flash welding process, thereby improves welding quality.
For solving the problems of the technologies described above, the flash welding manufacturing process of aluminium alloy thin-walled ring of the present invention, its technical scheme comprises the following steps:
Aluminium alloy D shape with opening ring base is put into to the flash butt welder that power is 1000KVA, and by the electroded clamping device of the arranged on left and right sides of described welding machine, the clamping force with 3KN～6KN clamps respectively to make the straight flange of its opening part arranged on left and right sides;
Starting described welding machine drives the right side straight flange of D shape ring base to move the opening closure that makes described ring base towards left side straight flange direction, apply the weldingvoltage of 7V～18V at two inter-stages of described welding machine, making the left side of described ring base opening part and the tiny contact point on right side is 20 A/mm by current density
2～150 A/mm
2Heating fusing after flashing current, outwards spray and form flash of light at a high speed after forming the liquid lintel that connects the two ends metal and explosion occurring, and the flash of light scaling loss speed between described left and right both ends of the surface is 6.0mm～10.0 mm/s; The right side that then drives described ring base opening part towards left side with initial velocity and the 2.0mm/s of 4.0mm/s ~ 6.0mm/s
2～4.0mm/s
2Acceleration do to accelerate feed motion, constantly form liquid lintel and constantly explosion between described left side and right side, distance≤5mm between described left side and right side, the flash of light process continues to carry out, until reach predetermined flash loss 15mm～25mm after the flash time of 2s ~ 4s, the flash of light process finishes, and being glistened, between left side after burning and right side, by one deck, very thin motlten metal covers;
Disconnect the voltage of described welding machine two inter-stages, the right side straight flange that drives D type ring base with the speed of 80 mm/s～120mm/s at a high speed to the left the straight flange direction move, together with making described right side after being burnt by flash of light and impinging upon under the upset force effect of left side at 6KN～11KN, described ring base is configured as flash welding thin-walled ring by upset;
Described thin-walled ring takes apart from welding machine after pressurize 10s～20s under the effect of upset force.
In the flash of light process, the right side of described D type ring base opening part is as follows to the relation between initial feed speed, flash of light acceleration and the flash of light scaling loss speed of left side:
V
1---flash of light scaling loss speed (mm/s);
V
0---the initial velocity (mm/s) when in the flash of light process, the right side of D type ring base opening part is to the left side feeding;
A---flash of light acceleration (mm/s
2);
Described aluminium alloy is preferably the 2A70 alloy.
The axial cross section size of described ring is 65mm * 30mm to the maximum.
Compared with prior art, beneficial effect of the present invention is as follows:
The flash welding manufacturing process of aluminium alloy thin-walled ring of the present invention, distance in welding process between the left side of D type ring base opening part and right side must be less than or equal to certain value, the guarantee contact point constantly is melted and is gone out by the flash of light explosion, and this is the necessary condition that motlten metal forms lintel.Adopt for the present invention the flash butt welder that power is 1000KVA, under given technological parameter condition, this certain value equals 5mm, therefore, necessary≤the 5mm of distance between described left side and right side, guarantee flash of light process continues to carry out, and improves welding quality; If the distance between described left side and right side is greater than 5mm, motlten metal just can't form lintel, thereby causes the flash of light process to occur that open circuit conditions causes flash of light to end, and affects the welding progress and likely causes weldment to scrap.
In the flash of light process, due to the right side of the D type ring base opening part feed speed V to left side
2Along with the time, increase gradually, and flash of light scaling loss speed V
1Under given technological parameter condition, be constant, therefore, flash of light beginning initial stage V
2<V
1, the spacing between described left side and right side constantly increases, and spacing=5mm between described left side and right side has reached the critical value that motlten metal forms lintel, V
2=V
1If now continue at V
2<V
1Condition under continue flash of light, will cause the spacing between described left side and right side>5mm, just can't form lintel between described left side and right side and produce and open circuit, flash of light is ended.Therefore, after the spacing between described left side and right side reaches 5mm, must be at V
2V
1Condition under continue flash of light, just can make the spacing between described left side and right side progressively dwindle, the flash of light process continued and stably carry out, covering until the flash of light process finishes the motlten metal that the contact-making surface of described left and right both ends of the surface is very thin by one deck.
If described right side is V to the initial velocity of left side feeding
0, have:
Formula is 1.: V
2=V
0+ at;
The distance of falling due to described left and right end face flash of light scaling loss is V
1T, described right side to the feeding distance of left side is
, make the distance≤5mm between described left side and right side, have:
Formula is 2.:
Spacing=5mm between described left side and right side, reached the critical value that motlten metal forms lintel, has:
Formula is 3.: V
2=V
1
By above-mentioned formula 1.～3. formula can derive:
Therefore, in the flash of light process, if the right side of D type ring base opening part is satisfied with flash of light scaling loss speed towards initial feed speed, the flash of light acceleration of left side
, just can make described ring carry out sustainedly and stably in the flash welding process, obtain well behaved weld part.
The aluminium alloy thin-walled ring that the trade mark of take is 2A70 is example, after heat treatment detect the room temperature tensile performance of this alloy thin-wall ring weld part, its tensile strength be 389MPa(be greater than the design instructions for use 358.2MPa), elongation after fracture be 7%(be greater than the design instructions for use 6%).
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the schematic diagram that D type ring base is put into flash butt welder.
Fig. 2 is the flash of light stage schematic diagram of D type ring base.
Fig. 3 is the schematic diagram after the flash of light of D type ring base opening part finishes.
Fig. 4 is the upset schematic diagram of D type ring base opening part.
Fig. 5 is the thin-walled ring schematic diagram of welding forming.
The specific embodiment
The flash welding manufacturing process of implementing aluminium alloy thin-walled ring of the present invention need to provide the equipment such as flash butt welder, manipulator.The aluminium alloy that China's material trademark of below take is 2A70 describes the specific embodiment of the method in detail as example:
The main chemical elements content (percentage by weight) of this alloy is: containing Cu amount 1.9%～2.5%, containing Mg amount 1.4%～1.8%, containing Fe amount 0.9%～1.5%, ni content 0.9%～1.5%, containing Ti amount 0.02%～0.10%, containing Mn amount 0.20%, containing Zn amount 0.30%, si content 0.35%, other elements single≤0.05% and summation≤0.10%, surplus be Al.
The flash welding forming technology step of this alloy thin-wall ring is as follows:
Step 1: installation.As shown in Figure 1,2A70 alloy D shape with opening ring base is put into to the flash butt welder that power is 1000KVA, described D shape ring base is comprised of left side straight flange 101, right side straight flange 102 and arc-shaped side 103, a side at its opening 110 places corresponding to left side straight flange 101 has left side 111, corresponding to a side of right side straight flange 102, has right side 112.During installation, the left side straight flange 101 of described D type ring base is put in the left side clamping device 10 of flash butt welder, upper clamp 11 and lower clamp 12(electrode by left side clamping device 10) clamp left side straight flange 101 from the upper and lower end face of left side straight flange 101 respectively, clamping force is 3KN～6KN; The right side straight flange 102 of described D type ring base is put in the right side clamping device 20 of flash butt welder, upper clamp 21 and lower clamp 22(electrode by right side clamping device 20) clamp right side straight flange 102 from the upper and lower end face of right side straight flange 102 respectively, clamping force is 3KN～6KN, and upper and lower end face and the front/rear end of left side straight flange 101 and right side straight flange 102 are alignd respectively.Described left side clamping device 10 is arranged on the fixed platen 30 of flash butt welder, right side clamping device 20 is arranged on the mobile platen 40 of flash butt welder, fixed platen 30 and mobile platen 40 are arranged on the support of flash butt welder, mobile platen 40 can drive right side clamping device 20 on support towards fixed platen 30 directions back and forth parallel the opening 110 of D type ring base is opened or is closed.
Step 2: flash of light.As shown in Figure 2, start mobile platen 40 drive right side clamping devices 20 and move towards the fixed platen direction on support, make the 111Yu right side, left side 112 at opening 110 places of D type ring base contact after-openings 110 in closure state; Apply the weldingvoltage of 7V～18V at two inter-stages of flash butt welder, the tiny contact point on 111Yu right side, described left side 112 is 20 A/mm due to current density being arranged
2～150 A/mm
2Flashing current is by forming resistance heating, the metal of these contact points is melted very soon, form the liquid " lintel " that connects the two ends metal, these liquid " lintel " explosion under electricity, heat, power acting in conjunction, outwards spray and form flash of light at a high speed, the flash of light scaling loss speed between described left and right both ends of the surface is 6.0mm～10.0mm/s; To move the 112Xiang left side 111, right side that makes D type ring base opening 110 places be that 4.0mm/s ~ 6.0mm/s, acceleration are 2.0mm/s towards the fixed platen direction as initial velocity to mobile platen 40 afterwards
2～4.0mm/s
2The acceleration feed motion, constantly form " lintel " and constantly explosion between 111Yu right side, described left side 112, remain≤5mm of distance between 111Yu right side, described left side 112, the flash of light process continues to carry out, until reach predetermined flash loss 15mm～25mm after the flash time of 2s～4s, the flash of light process finishes, as shown in Figure 3, very thin motlten metal covers by one deck for left side 111' after being burnt by flash of light and the both ends of the surface contact-making surface of right side 112', both ends of the surface contact-making surface temperature reaches the fusing point of metal, and tends towards stability evenly.
In the flash of light process, for keeping the flash of light process, can continue and stably carry out, the initial feed speed of the 112Xiang left side, right side 111 at D type ring base opening 110 places, flash of light acceleration should mate mutually with flash of light scaling loss speed, that is:
V
1---flash of light scaling loss speed (mm/s);
V
0---the initial velocity (mm/s) when in the flash of light process, the right side of D type ring base opening part is to the left side feeding;
A---flash of light acceleration (mm/s
2);
Because the power of flash butt welder is certain value, after having set welding parameter, the energy that in the flash of light process, flash butt welder applies welding end surface is also certain value, and therefore, in the situation that given material, flash of light scaling loss speed and flash of light acceleration are also certain values.
Step 3: upset.As shown in Figure 4, after flash of light finishes, disconnect the voltage of described welding machine two inter-stages, make mobile platen 40 drive right side clamping devices 20 on support towards the fixed platen direction speed high-speed mobile with 80mm/s～120mm/s, together with left side 111' after D type ring base is burnt by flash of light impinges upon under the upset force F of 6KN～11KN effect with right side 112' both ends of the surface, motlten metal between described both ends of the surface and metal oxide are all squeezed surface of the work, left side 111' and right side 112' two contact-making surfaces produce plastic deformations and make close contact between two metals on end face and metal, D type ring base is configured as flash welding thin-walled ring 200 as shown in Figure 5 by upset, described thin-walled ring 200 has weld part 201.
Step 4: pressurize.The thin-walled ring 200 of welding forming is kept to 10s～20s under the effect of upset force, fully just can take apart from flash butt welder after combination until weld seam.
Adopt the aluminium alloy thin-walled ring of 2A70 of said method welding forming, its axial cross section size is 65mm * 30mm to the maximum, and wherein, 65mm refers to ring height vertically, and 30mm refers to ring wall thickness radially.
Claims (4)
1. the flash welding manufacturing process of an aluminium alloy thin-walled ring, is characterized in that, comprises the following steps:
Aluminium alloy D shape with opening ring base is put into to the flash butt welder that power is 1000KVA, and by the electroded clamping device of the arranged on left and right sides of described welding machine, the clamping force with 3KN～6KN clamps respectively to make the straight flange of its opening part arranged on left and right sides;
Starting described welding machine drives the right side straight flange of D shape ring base to move the opening closure that makes described ring base towards left side straight flange direction, apply the weldingvoltage of 7V～18V at two inter-stages of described welding machine, making the left side of described ring base opening part and the tiny contact point on right side is 20 A/mm by current density
2～150 A/mm
2Heating fusing after flashing current, outwards spray and form flash of light at a high speed after forming the liquid lintel that connects the two ends metal and explosion occurring, and the flash of light scaling loss speed between described left and right both ends of the surface is 6.0mm～10.0mm/s; The right side that then drives described ring base opening part towards left side with initial velocity and the 2.0mm/s of 4.0mm/s ~ 6.0mm/s
2～4.0mm/s
2Acceleration do to accelerate feed motion, constantly form liquid lintel and constantly explosion between described left side and right side, distance≤5mm between described left side and right side, the flash of light process continues to carry out, until reach predetermined flash loss 15mm～25 mm after the flash time of 4s ~ 6s, the flash of light process finishes, and being glistened, between left side after burning and right side, by one deck, very thin motlten metal covers;
Disconnect the voltage of described welding machine two inter-stages, the right side straight flange that drives D type ring base with the speed of 80 mm/s～120mm/s at a high speed to the left the straight flange direction move, together with making described right side after being burnt by flash of light and impinging upon under the upset force effect of left side at 6KN～11KN, described ring base is configured as flash welding thin-walled ring by upset;
Described thin-walled ring takes apart from welding machine after pressurize 10s～20s under the effect of upset force.
2. the flash welding manufacturing process of aluminium alloy thin-walled ring according to claim 1, is characterized in that, described flash of light scaling loss speed meets the following conditions:
V
1---flash of light scaling loss speed (mm/s);
V
0---the initial velocity (mm/s) when in the flash of light process, the right side of D type ring base opening part is to the left side feeding;
A---flash of light acceleration (mm/s
2).
3. the flash welding manufacturing process of aluminium alloy thin-walled ring according to claim 1, it is characterized in that: described aluminium alloy is 2A70.
4. according to the flash welding manufacturing process of the described aluminium alloy thin-walled ring of any one in claim 1～3, it is characterized in that: the axial cross section size maximum of described ring is 65mm * 30mm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607781A (en) * | 2014-12-15 | 2015-05-13 | 贵州安大航空锻造有限责任公司 | Flash welding forming method for stainless steel large-section ring piece |
| CN104625376A (en) * | 2014-12-15 | 2015-05-20 | 贵州安大航空锻造有限责任公司 | Flash welding forming method for aluminum alloy large-cross-section ring piece |
| CN107088701A (en) * | 2017-04-20 | 2017-08-25 | 天津商科数控技术股份有限公司 | A kind of direct contact type exchanges trapezoidal wave aluminium resistance-welding process method |
| CN112605512A (en) * | 2020-11-06 | 2021-04-06 | 邯郸钢铁集团有限责任公司 | Pulse flash butt welding method for 780 Mpa-grade hot-rolled dual-phase wheel steel |
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| CN1233548A (en) * | 1999-04-02 | 1999-11-03 | 上海康适达轮圈有限公司 | Flash butt welding technology for aluminium alloy wheel rim of automobile and motor cycle |
| CN101609322A (en) * | 2009-07-21 | 2009-12-23 | 江苏金茂制链有限公司 | A kind of method of large-size high-tensile degree circle chain of mine welding control |
| WO2010119461A1 (en) * | 2009-04-16 | 2010-10-21 | Davide Vaia | Welding head for rail welding |
| CN102107320A (en) * | 2010-12-30 | 2011-06-29 | 首钢总公司 | Pulsed switch-on preheating flash butt welding process for steel rims of heavy trucks |
-
2012
- 2012-11-23 CN CN201210479163.3A patent/CN102935551B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1233548A (en) * | 1999-04-02 | 1999-11-03 | 上海康适达轮圈有限公司 | Flash butt welding technology for aluminium alloy wheel rim of automobile and motor cycle |
| WO2010119461A1 (en) * | 2009-04-16 | 2010-10-21 | Davide Vaia | Welding head for rail welding |
| CN101609322A (en) * | 2009-07-21 | 2009-12-23 | 江苏金茂制链有限公司 | A kind of method of large-size high-tensile degree circle chain of mine welding control |
| CN102107320A (en) * | 2010-12-30 | 2011-06-29 | 首钢总公司 | Pulsed switch-on preheating flash butt welding process for steel rims of heavy trucks |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607781A (en) * | 2014-12-15 | 2015-05-13 | 贵州安大航空锻造有限责任公司 | Flash welding forming method for stainless steel large-section ring piece |
| CN104625376A (en) * | 2014-12-15 | 2015-05-20 | 贵州安大航空锻造有限责任公司 | Flash welding forming method for aluminum alloy large-cross-section ring piece |
| CN104607781B (en) * | 2014-12-15 | 2016-08-24 | 贵州安大航空锻造有限责任公司 | The flash welding manufacturing process of rustless steel heavy in section ring |
| CN107088701A (en) * | 2017-04-20 | 2017-08-25 | 天津商科数控技术股份有限公司 | A kind of direct contact type exchanges trapezoidal wave aluminium resistance-welding process method |
| CN107088701B (en) * | 2017-04-20 | 2019-08-02 | 天津商科数控技术股份有限公司 | A kind of direct contact type exchange trapezoidal wave aluminium resistance-welding process method |
| CN112605512A (en) * | 2020-11-06 | 2021-04-06 | 邯郸钢铁集团有限责任公司 | Pulse flash butt welding method for 780 Mpa-grade hot-rolled dual-phase wheel steel |
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